Samsung Gear S2 3G vs Polar M430

Either the dial or swiping can be used to navigate between screens. You access widgets right of the watchface and notifications left of the watchface. You can use the dial to select an app, a button on the side to take a step back or a different button on the side to return to the homescreen.

The watch has a rotating bezel for interface navigation that's both intuitive to use and provides actual tactile feedback.

Gear S2 3G includes an accelerometer, a barometer, a gyroscope, a heart rate monitor, a proximity sensor, a compass, and a UV light sensor enabling developers to get very creative with their apps.

S2 has a 1.2" 360 x 360 (302ppi) Super AMOLED display. It's bright enough to use outdoors and has good viewing angles.

It has a stainless steel body that makes it feel like a high quality product.

There's a 300mah battery inside the S2 3G. It lasts 2 days on average with ambient lighting off and 1 day with ambient lighting on.

The product is IP68 certified. The certification guarantees that the product can be submerged up to a meter and a half in water at room temperature for up to 30 minutes.

Not only is this watch useful for running, you can leave it on for the whole day and it will monitor your sleep, give recommendations on training intensity as well as recovery, and keep your heart rate in check. With GPS off, it can work for 20 days, so you'll only have to take it off twice a month or so to recharge.

This watch offers great value for the money - usually, you have to be ready to pay $300 and more for a decent sports watch, but M430 does the same job and costs around $200.

Although this watch is targeted primarily at runners, you can also use it for biking, swimming, strength training, and many other indoor and outdoor activities that you can choose in the Polar app.

Even to date, the majority of sports watches don't offer particularly good hear rate tracking capabilities. You either have to buy an additional chest strap or rely on built-in sensors that are often imprecise. The M430 offers the best of the two worlds - you can get data nearly as precise as from a chest strap without having to buy and wear one.